I've been trying to find/enable/check MTP settings on my Sony Experia (Android 4.4) for over two hours now... this seems to be a very common problem for people at the moment. I also don't have any "More Options" item in Settings > Storage, and no "More" ellipsis top-right. Maybe if you find yours on your Galaxy, you could tell us where you found it and it might be in the same place on mine.